We can infer from the film that for many of the people who appear in it there is no moral difference between animals being used in medical research and animals being killed for fashion but for many potential viewers there is, and any film that truly wants to redefine the way we behave towards animals needs to address it. It is fine for a documentary such as this to raise questions it doesn't answer but it is self-defeating for a documentary such as this to raise questions it doesn't even debate.
Because its arguments are underdeveloped, "The Ghosts in Our Machine" feels too long. It is a new 90-minute film that says little that was not said more effectively 50 years ago in Georges Franju's 30-minute "Blood of the Beasts". But perhaps that is not as damning a criticism as it might seem. Part of the argument McArthur and Marshall are making is that our attitudes to animals have progressed little since then and our mistreatment of them is so egregious it should be decried over and over until the situation changes forever.